IntelBX80677I77700K
IntelBX80648I75820K

4 Cores, 8 Threads @4.2GHz, Kaby Lake.
Release date: Q1 2017.

6 Cores, 12 Threads @3.3GHz, Haswell-E.
Release date: Q3 2014.

Real World Speed
Performance profile from 274,757 user samples
228,645 User Benchmarks
Best Bench: 110% Base clock 4.2 GHz, turbo 5.1 GHz (avg)
Worst Bench: 79% Base clock 4.2 GHz, turbo 1.8 GHz (avg)
Poor: 79% Great: 110%
SPEED RANK: 32nd / 1144
Gaming
Gaming 96%
Nuclear submarine
Desktop
Desktop 97%
Nuclear submarine
Workstation
Workstation 71%
Battleship
46,112 User Benchmarks
Best Bench: 104% Base clock 3.3 GHz, turbo 4.45 GHz (avg)
Worst Bench: 67% Base clock 3.3 GHz
Poor: 67% Great: 104%
SPEED RANK: 58th / 1144
Gaming
Gaming 84%
Aircraft carrier
Desktop
Desktop 81%
Aircraft carrier
Workstation
Workstation 74%
Battleship
Effective Speed
Effective CPU Speed
95.6 % Slightly faster effective speed.
+14%
84.1 %
SC Mixed
Avg. Single Core Mixed Speed
136 Pts Faster single-core speed.
+30%
105 Pts
QC Mixed
Avg. Quad Core Mixed Speed
465 Pts Slightly faster quad-core speed.
+13%
411 Pts
MC Mixed
Avg. Multi Core Mixed Speed
719 Pts 846 Pts Faster multi-core speed.
+18%
SC Mixed
OC Single Core Mixed Speed
152 Pts Faster OC single-core speed.
+17%
130 Pts
QC Mixed
OC Quad Core Mixed Speed
553 Pts Slightly faster OC quad-core speed.
+7%
519 Pts
MC Mixed
OC Multi Core Mixed Speed
809 Pts 1036 Pts Faster OC multi-core speed.
+28%
Market Share
Based on 13,926,557 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.86 % Hugely higher market share.
+417%
0.36 %
Value
Value For Money
89.2 % Better value.
+18%
75.4 %
User Rating
UBM User Rating
125 % Hugely more popular.
+89%
66 %
Price
Price (score)
$350 Slightly cheaper.
+10%
$391
Age
Newest
24 Months Much more recent.
+55%
53 Months
TDP
Thermal Design Power (TDP)
91 Watts Much more energy efficient.
+35%
140 Watts
Cores
CPU Processing Cores
4 cores 6 cores Much higher core count.
+50%
Threads
CPU Processing Threads
8 threads 12 threads Much higher thread count.
+50%
Lithography
Manufacturing process
14 nm Much newer manufacturing.
+36%
22 nm
Base Clock
Base Clock Speed
4.2 GHz Faster base frequency.
+27%
3.3 GHz
Turbo Clock
Turbo Clock Speed
4.5 GHz Faster turbo frequency.
+25%
3.6 GHz
SC Int
Single Core Integer Speed
149 Pts Slightly faster single-core int speed.
+14%
131 Pts
SC Float
Single Core Floating Point Speed
158 Pts Faster single-core fp speed.
+22%
129 Pts
QC Int
Quad Core Integer Speed
539 Pts +4% 519 Pts
QC Float
Quad Core Floating Point Speed
577 Pts Slightly faster quad-core fp speed.
+11%
518 Pts
MC Int
Multi Core Integer Speed
738 Pts 987 Pts Much faster multi-core int speed.
+34%
MC Float
Multi Core Floating Point Speed
866 Pts 1055 Pts Faster multi-core fp speed.
+22%
Series
CPU Architecture
Kaby Lake Haswell-E
Socket
Motherboard Socket
FCLGA1151 LGA2011-V3
Graphics
Integrated Graphics
HD 630 None
Launch Date
Launch Date
Q1'17 Q3'14
Cache
Cache
8 MB 15 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX 2.0 SSE4.2, AVX 2.0, AES
Lithography
Lithography
14 nm 22 nm
Recommended Price
Recommended Customer Price
$339.00 - $350.00 $389.00 - $396.00
Bus Speed
Bus Speed
8 GT/s DMI3 0 GT/s
Memory Types
Memory Types
DDR4-2133/2400, DDR3L-1333/1600 @ 1.35V DDR4 1333/1600/2133
Memory Channels
Max # of Memory Channels
2 4
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 630 None
Package Size
Package Size
37.5mm x 37.5mm 52.5mm x 45.0mm
Max # of PCI Express Lanes
Max # of PCI Express Lanes
16 28

More specs » More specs »
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The Core i7-7700K is Intel’s flagship Kaby Lake based CPU which is reported to have the same IPC as its predecessor, Skylake. Comparing the 7700K and 6700K shows that both average effective speed and peak overclocked speed are up by 7%. Most of the increase in average effective speed is explained by the 5% boost in base clocks from 4.0 to 4.2 GHz. The improved peak lab speed is attributable to a combination of better overclocking capacity and improvements in Intel’s speedshift technology which make the 7700K slightly more responsive. Kaby Lake also has marginally better HD 630 integrated graphics. The i7-7700K is priced similarly to the i7-6700K so for top end gaming and workstation builds, the 7700K is the clear choice for 2017. AMD’s Ryzen will release later this year so things could change at that time. [Jan '17 CPUPro]

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The Intel Core i7-5820K is the cheapest of three (5820K,5930K,5960X) new Haswell-E prosumer/enthusiast processors. The 5820K sports six physical cores and twelve threads which allow for enormous processing throughput. Unfortunately Intel have somewhat handicapped the 5820K by setting its base clock at just 3.3 GHz, 0.7GHz lower than the class leading 4790K. Comparing the 4790K and 5820K shows that the cheaper i7-4790K is significantly faster at both single and dual threaded workloads. The additional two cores found in the 5820K are not relevant to general computing and as such the 5820K probably makes a better server rather than consumer proposition. The Haswell-E X99 architecture also requires DDR4 RAM which is currently far more expensive than DDR3. Overall the 5820K is a very expensive option and probably best avoided by the vast majority of consumers.  [Sep '14 CPUPro]

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Processor Rankings (Price vs Performance) January 2019 CPU Rankings.

We calculate effective speed which measures real world performance for typical consumers. Effective speed is adjusted by current prices to yield a value for money rating which is geared towards gamers. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top CPUs. [CPUPro]

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Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
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Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

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  • - CPU tests include: integer, floating and string.
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  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
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Intel Core i5-8600K $260Nvidia GTX 1080-Ti $808Samsung 850 Pro 256GB $163
HDDRAMUSB
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WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $132SanDisk Ultra Fit 32GB $12
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